Gree GMV6 DC Inverter VRF Units Service Manual
144
2.100 "H6" IPM Module Protection for Fan Drive
Fault display:
main board of outdoor unit displays
Fault diagnosis:
If the fault code displayed on the 2-digit digital LED of the outdoor unit's main control board is H6, it
indicates the IPM module protection for the fan drive.
Possible causes:
■ Poor contact of fan's UVW cables;
■ The fan is damaged;
■ The blades are stuck (the blade
s are blocked or the motor shaft gets rusty);
■ The fan drive board operates improperly.
Troubleshooting:
"H6" IPM Module
Protection for the Fan Drive
The fan drive board is
abnormal
Yes
Replace the fan drive board
No
Whether the U, V and W phases of fan
wires are connected properly?
Yes
No
Replace the fan
Whether the resistance between
the windings of each phase for the fan is normal
(generally less than 10 ohms)? Whether the resistance values
are equal to each other? Is grounding insulation of the phase
windings of the fan normal (generally greater
than 2 megohms)?
Yes
Yes
Remove foreign matters
Whether blades are stuck
due to foreign matters or rusting
of motor shaft?
Yes
Yes
Replace the faulty fan
Have other faults
occurred at the same time (for example,
fan startup failure (HJ), over-current protection
(H5) and loss of synchronization
for fan (H9))?
Summary of Contents for GMV-1015WM/G-U
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